United States Department of Transportation
i
Exploring travelers' behavior in response to dynamic message signs (DMS) using a driving simulator.
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2013-10-01
[PDF-1.32 MB]
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Abstract:This research studies the effectiveness of a dynamic message sign (DMS) using a driving
simulator. Over 100 subjects from different socio-economic and age groups were recruited to
drive the simulator under different traffic and driving conditions and various travel-related
DMS messages. The subjects drove between a specified pair of origin and destination while
choosing their own route in a fairly realistic 12 × 12 mi2 (20 × 20 km2) network that included
road signs, traffic signals, three-dimensional buildings and trees, and other roadside objects.
Their driving behavior, including changes in driving speed, route choice and diversion, and
travel time perception in the presence of DMS were studied. In addition to the driving simulator
experiment, a stated preference analysis was conducted through three sequential survey
questionnaires. The questionnaire data was utilized to better understand drivers’ perceptions of
the efficiency-related attributes. The study concluded that DMS is a safe device, since drivers
did not reduce their speed significantly to read the DMS contents. Furthermore, quantitative
information provided by DMS affected drivers’ route choice significantly and drivers were
quite sensitive to travel time change. However, the diversion rate due to a second DMS with
qualitative information was much less than what the subjects stated in the survey.
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